Harrow



Oct. 19, 1937. A, K AS 2,096,640

HARROW Filed Dec. 17, 1936 ilnucnion JiTIIZa-s as at 16 and I1.

Patented Oct. 19, 1937 UNITED STATES PATENT OFFICE HARROW Alexander T.Klas, Lamesa, Tex.

Application December 17, 1936, Serial No. 116,406

1 Claim.

This invention relates to a harrow and it aims to provide a novelconstruction wherein the same may be periodically and at will cleared oftrash or other clogging material.

The invention particularly concerns a harrow of the character used inthe West, specially in the springtime, to harrow or cultivate the cropswith a view to stopping sand from blowing after a hard rain, and whichblowing or loose sand is very injurious to crops. Since the harrowaccording to the present invention is capable of being cleared whendesired, the harrowing operation may be effected more expeditiously andefficiently.

An operative embodiment is shown in accompanying drawing wherein:

Figure 1 is a plan view of the improved harrow; c

Figure 2 is a detail section taken on the line 2-2 of Figure 1;

Figure 3 is a detail section taken on the line 3-3 of Figure 1, and

Figure 4 is a detail section taken on the line 44 of Figure l. I

Referring-specifically to the drawing wherein like reference charactersdesignate like or similar parts, I0 designates a suitable frame whichmay be drawn by a tractor or animal power as preferred, the same beingsuitably hitched by a clevis II. This frame includes side members I2having rearwardly extending bearing arms I3. A central rearwardlyextending bearing arm is shown at M and the bearing arms [3 and M arebraced by members l5 riveted or bolted thereto The clevis H and membersl0 and [4 are bolted or rivetedtogether as at I8.

Journaled in the bearing arms l3 and I4 is a shaft IS, the bearing armshaving portions and detachable plates 2|, arcuate and conforming to theshape of the shaft l9 and detachably connected together as by means ofbolts 22.

Harrow members 23 are equidistantly spaced along the shaft [9 and bymeans of set screws 24, threaded in hubs 25 thereof, they are rigidlyconnected to the shaft. Each harrow member has a plurality of teeth orspikes 26, the same being equidistantly spaced apart and those of thedifferent harrow members being in longitudinal rows.

Said shaft I9 is normally stationary but it may be rotated in thebearing arms l3 and I4. To prevent rotation of the shaft 19, a collar 21is provided thereon which has peripheral sockets at 28 in line with therows of teeth. A lever 29 is pivotally connected at 30 to the bearingbar 14 and it has a latch portion 3i thereon which is engageable in anyof the three sockets 28, as best shown in Figure 3. A contractile coilspring 32 is connected at 33 to the lever 29 and at 34 to an extension35 of the bearing bar M. The spring 32 normally maintains the latch 3|engaged with one of the sockets 28 and thus the shaft and harrow is heldstationary. A cable or other flexible draw element 36 is connected tothe upper end of the lever 29 and when desired, the operator, from thedraft means, may pull the cable and disengage the latch 30 from a socket28, that is, when trash is collected by the teeth and. the same areclogged. When the harrow is thus released, it will rotate through thecontact of the teeth 26 with the'soil, thereby releasing the trash, andthe harrow rotates until the latch registers with the following socket28 into which it snaps through the urgency of the spring 32, the drawelement 36 in the meantime having been released. In this manner,whenever desired, collected trash'or debris may be released bypermitting the normally and rotatable harrow, to rotate one hundred andtwenty degrees Various changes may be resorted to provided III they fallwithin the spirit and scope of the in-.

distantly spaced sockets about the shaft, a lever pivoted to theintermediate bearing arm provided with a latch engageable with saidsockets selectively, spring means urging the lever into engagement witha socket, said harrow members, through draft of the apparatus beingrotatable through contact with the soil.

ALEXANDER T. KLAS.

